Which species originated in Africa around 200,000-100,000 years ago?
a. Homo erectus
b. Homo habilis
c. Australopithecus afarensis
d. Homo floresiensis
e. Homo sapiens
ANSWER: e
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Siderophores from some pathogens remove iron from the host protein(s)
A) lactoferrin. B) transferrin. C) both lactoferrin and transferrin. D) cytochromes.
In a hypothetical study, equal numbers of marked dark and light moths are released in polluted and unpolluted woodlands and recaptured 10 days later. According to the industrial melanism hypothesis, which of the following results is unexpected?
A. More marked dark moths should be recaptured in polluted woodlands than in unpolluted woodlands. B. Fewer marked light moths should be recaptured in polluted woodlands than in unpolluted woodlands. C. Fewer marked dark moths should be recaptured in unpolluted woodlands than in polluted woodlands. D. More marked light moths should be recaptured in unpolluted woodlands than in polluted woodlands. E. Fewer unmarked dark moths should be captured in polluted woodlands than unmarked light moths.
The study of evolutionary relationships among organisms is called ________.
A. biotechnology B. genetics C. taxonomy D. phylogeny E. recombinant DNA
Which factor has little effect on the rate of transpiration?
a. air temperature b. relative humidity c. air movement d. the amount of direct solar radiation e. daily fluctuations in atmospheric carbon dioxide concentrations